Are these Adsorption and Colloids notes free?

Yes. The full 6-page Adsorption and Colloids sheet is free inside CapCompass, which runs in your browser with no account needed.

What does the Adsorption and Colloids revision sheet cover?

Adsorption: the Idea, Adsorption vs Absorption, Adsorption, Absorption, Physisorption vs Chemisorption, Physisorption vs Chemisorption, by the Numbers, What Controls How Much Gets Adsorbed, The Freundlich Adsorption Isotherm, Applications of Adsorption, Catalysis: Homogeneous and Heterogeneous, Inhibitors and Catalyst Selectivity, The Catalytic Cycle at a Solid Surface.

Is this for Class 11 Maharashtra HSC Chemistry?

Yes, it is written for the Maharashtra HSC Chemistry syllabus.

🧭 CapCompassfree study planner

Adsorption and Colloids — Class 11 Maharashtra HSC Chemistry revision notes

A 6-page visual revision sheet for Adsorption and Colloids, written for Class 11 Maharashtra HSC Chemistry. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.

Adsorption and Colloids revision notes, page 1 of 6 — A preview of page 1 — all 6 pages open full size in the app.

Adsorption and Colloids in one look

why surfaces hold onto things, and what happens when a dispersed particle is too big for a solution and too small to see

Adsorption: the Idea

surface molecules have unsatisfied bonds, unlike the bulk, so surfaces pull in touching gas or solute
adsorbent: the bulk solid whose surface holds a substance. adsorbate: the substance held there
physisorption comes from London / van der Waals forces, driven by minimising surface energy
desorption: removing an already-adsorbed substance from its surface

Adsorption vs Absorption

Adsorption

a SURFACE phenomenon: matter concentrates only at the surface
depends on temperature, pressure, and surface area
releases heat (heat of adsorption)
e.g. a gas held on activated charcoal

Absorption

a BULK phenomenon: matter spreads uniformly through the whole substance
independent of pressure and surface area
no accompanying heat change
e.g. water soaking into cotton

Physisorption vs Chemisorption

physisorption: weak van der Waals forces, reversible, multilayered, favoured at LOW temperature
chemisorption: genuine covalent or ionic bonds, specific pairs only, usually exothermic, one layer
chemisorption first RISES with temperature, then FALLS once the bonds start breaking
not exclusive: physisorption at low T can convert to chemisorption as T rises

Page 1 of 6. The full sheet, all 6 pages, opens free in the app.

What this Adsorption and Colloids sheet covers

Adsorption: the Idea
Adsorption vs Absorption
Adsorption
Absorption
Physisorption vs Chemisorption
Physisorption vs Chemisorption, by the Numbers
What Controls How Much Gets Adsorbed
The Freundlich Adsorption Isotherm
Applications of Adsorption
Catalysis: Homogeneous and Heterogeneous
Inhibitors and Catalyst Selectivity
The Catalytic Cycle at a Solid Surface
Diffusion
Reaction
Desorption
Colloids: Between a Solution and a Suspension
Colloid Types by Physical State
Classifying Colloids: Affinity and Size
Micelles: How Soap Actually Works
Preparing Colloids
Purifying a Colloidal Solution: Dialysis
Optical and Kinetic Properties
Electrical Properties and Coagulation
Emulsions
Applications of Colloids
Traps that cost marks
Tricks that save time

Open the full Adsorption and Colloids sheet →Free, works offline, no account needed. All 6 pages, plus a study plan built around your own exam dates.

How CapCompass uses this sheet

These notes are not a standalone PDF. CapCompass plans Chemistry chapter by chapter against your real exam dates and free hours, and when the plan reaches Adsorption and Colloids the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.